I am about to purchase a Trident exhaust and I know I need the map for optimal performance. Will I NEED a Tuneboy or Power Commander as part of the exhaust modification? If not, what benefits do either really provide? And if I DO need one, which one would be best? I have a 2003 S3.
I've been doing some research on the matter but am still a bit confused as to whether or not one of these is needed with exhaust modifications.
I've been doing some research on the matter but am still a bit confused as to whether or not one of these is needed with exhaust modifications.